--- version: rssac002v3 service: i.root-servers.net start-period: '2021-12-18T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6028118298 dns-udp-queries-received-ipv6: 1603594394 dns-tcp-queries-received-ipv4: 582975180 dns-tcp-queries-received-ipv6: 77824689 dns-udp-responses-sent-ipv4: 5300041932 dns-udp-responses-sent-ipv6: 1504495888 dns-tcp-responses-sent-ipv4: 583002535 dns-tcp-responses-sent-ipv6: 62407561